At this point, two cylinders are installed, and two are still on the bench. I needed to rotate the engine case on the crankshaft in order to push out the lower connecting rods. With the main bearing block nuts un-torqued, there is a risk that just rotating the crankcase will spin a main bearing, resulting in a mismatch of the oil gallery holes and ruining the bearing (or nore) during initial startup.
So.... I torqued all cylinder base nuts to 25 ft lbs, a little more than half of the final torque value. Rotated the engine to position the connecting rods for the last two.